Setting The Profibus Dp Address And Terminating Resistor - Siemens ET 200pro Operating Instructions Manual

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3.9 Setting the PROFIBUS DP Address and Terminating Resistor

3.9 Setting the PROFIBUS DP Address and Terminating Resistor
Introduction
Set the PROFIBUS DP address and terminating resistor at the connection module for the
interface module.
● The PROFIBUS address defines the point of access to the ET 200pro on PROFIBUS DP.
● A PROFIBUS DP segment must be terminated at both ends, in other words on the first
and last segment node, with its characteristic impedance. If the ET 200pro is the last
PROFIBUS DP node, the integrated terminating resistor has to be activated.
If you activate the terminating resistor in the middle of a DP segment, all the subsequent
DP nodes are disconnected. If you are servicing the system you can use this function to
locate errors by a selective activating / deactivating of the terminating resistors of the
other DP nodes.
Requirements
● Valid PROFIBUS DP addresses are 1 to 125.
● All PROFIBUS DP addresses must be unique.
● The set PROFIBUS DP address must correspond with the definition in the configuration
software of this ET 200pro.
Required tools
● Screwdriver with 2.5 mm blade
● 32-mm wrench
64
①
PROFIBUS DP
②
Terminating resistor is activated
③
The other DP nodes are disconnected
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08